Matthew McConaughey and longtime girlfriend Camila Alves are set to tie the knot in the groom's home state of Texas this weekend, E! News reports.

The notoriously private couple is keeping their nuptials a low key affair, inviting only a handful of close friends and family to the ceremony. The wedding is so top secret, workers at the location have been asked to sign nondisclosure agreements to protect the privacy of their special day.

The Magic Mike star and his Brazilian model fiancee got engaged on Christmas Day 2011, when the 42-year-old actor proposed and shared the happy news on his WhoSay account.

"Just asked Camila to marry me, Merry Christmas," he wrote as a caption for the picture he posted to the site.

Marriage is the last piece of the puzzle for the pair, who have been dating since 2006 and are parents to children Levi, 4, and Vida, 2.